Vacuum tank



April 23, 1929.

Y T. BOSSARD -IACUUM TANK Filed May 5, 1926 4 Sheets-Sheet 1 April 23, 1929. BOSSARD 1,710,253

VACUUM TANK Filed May 5. 1926 4 Sheets-Shet 2 35% V 615mm abko'zmq April 23, 1929.

T. BossA D VACUUM TANK Filed May a. 1926 4 Shqets-Sheet flarrn't Ema/14L attoz "m "ill Patented Apr. 23, 1929.

PATENT OFFICE.

THEODORE BOSSARD, OF SALT LAKE CITY, UTAH, ASSIGNOR TO NATIONAL PRODUCTS INGORPURATED, A CORPORATION OF UTAH.

VACUUM TANK.

My invention relates to carburetors and has for its object to provide a new and ellicient carburetor :tor internal comlnistion engines. A :lurtherobject is to provide a new car mretor :lor internal combustion engines, havng a const nt iloivel gasoline and with the amount oi." r'r mixed therewith is controlled by the driveror operator of the engine.

A still tiutner object to provideacombination carlairetor and "vacuum tank.

A still further object is to provide a new and eilicient vacuum tank and carburetor combined, in which the amount oft gasoline in the vacuum tank is cont-rolled by the amount oi? gasoline used in the carburetor, and both by the amount of air mixed with the gasoline in the carburetor.

These objects T .ccomplisa with the device illustrated in the accompanying drawings in which similar jmunerals and letters of reference indicate like parts throughout the several views and as describedin the speciiication forming a part of this application and pointed out in. the appended claims.

In thetlrawi ngs in which l. have shown the best and most prciei icd :torm oi constructing my invention, ,li igure l is a side elevation of my device. Figure 2 is an end elevation of the tank end of my device. l igure 3 is a plan view of the device. Figure l is an end elevation of the mixing end of my device. Figure 53 is a vertical longitudinal section of the device, enlarg'd from the other views. l igure 13 is a plan view of the vacuum tank and valve casing opening into said tank l igure 7 is a side elevation of the air valve stems and plunge Figure 8 is anelevation of the air valve within its housing, and the lion t and its connection in el.e"a 9 is an enlarged view in section of thefloat and friction holding support. Figure lO-is the air regulating platx Figure 11 is the valve against which the said plate bears. Figure 12 is an end view of the air valve, sl'iowing the ports which are brought into alinemont with the holes in the air regulattion. lligu re Application filed May 3, 1928. Serial No. 106,350.

chamber is determined and regulated by the air passing through the mixing chamber, as

regulated by the suction of the pistons of the engine. I thus regulate the amount of gasoline used in the operation of the engine by the amount of air drawn through the device by the suction of the pistons of the engine connnensurate with the speed and load carried by the engine, and to shut oif all of the gasoline when the engine is running by m0- mentum or gravity, as going down an incline I in the drawings I have shown the casing asconsisting ot a vertical casing A, with an integral cross-casing B having a choker inlet tubeO, and with a cylindrically-shaped vacuum tank D secured on the upper side 01 said cross-casing 13. The said casing A has its n'iedial portion transversely cut by the throttle valve *asing E. The throttle casing it is closed at one end by the perforated flatted portion 1 of the said casing A, and at the other end by the end plate 2. The throttle valve is a eylindrically-shaped hollow drumB, having a solid head in oneend to support the stub shaft 4, on whichis sccured an arm 4-, and. a perforated head 5'in its other end, as shown in .lfigure 5, and on which. the stub shaft (5 is integrally formed or secured in alinement with the said stub shaft l. The said stub shaft 6 is journalled (see Figure 11). An air regulating plate 9 is carried on the stub shaft 6, with a lever arm 9 secured thereon, and has perforations 10, 11 and 12 therein. The perforations 10 are round and the perforations 11 and 12 are arc-shaped slots. In the side walls ol said throttle valve drum 3 are cut a circular open ing 14., and diametrically'opposite an elongated slot The casing A has four perforations or openings 17 bored therein (see .l igure 3), which openings extend through the lower portion thereof (see Figure ,5); The extreme lower portion of said openings 17 are threaded as at 16, to receive the four rings 18. On the exterior and upper end of each of said plugs is secured the hollow mixers 19, each of which is made of spirally oted thereto by the pin 38. The le chamherfll.

v supply of gasoline is curved wire, the convolutionsot-which are close together, and the upper end portions are contracted toclose the opening through them. A central longitudinal opening or conduit is bored through each of said plugs 18, through which gasoline flows to the interior of said mixers 19, when the openings 1% and 15 are in alinement with the interior of said casing A. A float chamber 2155 provided in one end of the casing- Pi, within which chamber the tloat22 is mounted by pivoting one edge on a pin 23 held at its ends in the bracket 64 of the casing l3. The vacuum tank D'is closelyilitte d within the upper side of said casing B and angle thereto by a tap screwid which is passed throiuma hole centrallyborcdin the bottom oi said tank and screwed into the upper wall of the casi igure The upper portion ll of the casingli and the lower por the vacuum tank D form a gasoln F, in wl lch gasoline is stored after the tank D and before it is needed A needle valve 1- upon the upper side of the 522 and in a valve seat 26 cut in tie upper wall 0 the casing B. A hole 27 connects the stora chamber f F with the ii at hamber and th regulated by the valv Another valve 28 carried in the uppe chamber of the vacuum tank D- and seats in a valve 29 cut in a hole 30 bored throng the wall between the upp r chamber D an thechambenDh Two cylindrical casings 3 and are formed on one side of the vacuum tank D and form the casi in whic the needle valves carried and opcrated itor A ,N wi h psi controlling the release the gasoline suptaukID. The said rod is longitudinally slotted to receive the lever 37 which is piver 37' is given. tlieii'orm of a bell crank ever and the lower and tree endot the crank is weighted as at 39. The upper end of the said lever 37 isiormed into acatch 1-0. A float ll is longitudinally carried on said rod 34 and is moved up. and down the length of the said rod by the. amount of gasoline in the vacuum tank D. A cylindrical spool 42 is carr ed on the rod 3 1 above the float 11 and the central bore of-said spool 4L2 is contracted or inwardly flanged, at the upper end, as at 13, and in which flange the end 40 of the lever 37 catches holding the spool up on the rod 3st until the gasoline in'the tank D has been allowed to flow out in suflicient quantity to allow the float 41 to reston the lower portion of the 'stem 46 is pivotally images lever 57. s -Fhen the lever 87 is thus moved the spool'is released and slides down the rod 3a. is bifurcated lever as is pivoted at one side 01 the cylindrical casing 31 and the tree bifurcated end 15- of said lever 4:4; engages with the ends of the said spool A. valve mounted to said lev r 14 and has a needle valve 47 formed on its upper end, whi h valve seats in a valve seat d8 cut in the upper end of the said cylinder 31 and said f alve stem lG' is freely carried in a plunger 4L9, to allow passage of air therearoimd. The said valve 4 7 controls the amount of air suction which is allowed to enter, into the vacuum tank D, from the engine of the vehicle. The upper end of the said cylindrical casing 31'is internally threaded to receive theconnection to the intake manifold which supplies the necessary air suction to the vacuum'tank. A slidahle plunger :9 is

carried in the said cylindrical casing 31 and formed in a frame shape so that the lever il can operate therethrough u thout interierence. The lower end of :he pluno'er is connected with the needle valve 28 by LDC valve stem 50 which has a flanged portion 58 thereon A valve seat 51 is provided in the cas ing 32 and a needle valve 52 controls the amount of gasoline allowed to enter through said valve seat 5 i-i valve stem 53h; con- 0 s centrally pivoted to D hv the bracket 5'? and the the ever 55 connect with the two a re stems 53 and 50 under'thc flanged porrions andfl58, forcing one of the stems up in the lower end of toe n the other is down, and the c When the plunger 49 is lowered 2Swill be opened, and a weighted lev i will be moved on its pivot and open the valve {36, and all air t oenter the vacuum tank and the gasoline will flow freely from the tankD to the chamber Threaded plugs are screwed into the lower ends of the cvlindrical casings 81 and 32to close them. Closure plugs 6i and 62 are screwed into the bottom of the casing l3 and whenrei'noved leave holes in which to work on the float and the spiral coils 19.

The operation of my carburetor lows Gasoline is drawn into the vacuum tank D through the valve52 when the motor is rotated and suction is created in the pistons. The air. suction will then draw theplung'er 19 upwardly and the valve 28 will be closed and through the rocker lever 55 the valve 52 will be opened, and the release air valve 66 will be closed. Gasoline will then enter the chamber l) and as suiiic-icnt amountis allowed to enter the float, will rise on the rod 8% forcing thespool 42 upwardly and at a predeteris as fol mined point the bifurcated lever 44, having its ends engaged with the said spool 42, will force the valve stem 46 upwardly and will seat the valve 47 in its seat 48, thus shutting oi? the air suction inside the tank D. Then the suction is thus cut off the plunger 49 will fall and being connected with the valve 28 by the stem 50, the valve will be opened and. gasoline will. flow through the hole 30 into the supply chamber E. lVhen the float in the float chamber 21 is down and there is no gasoline or net a small an'iount, the valve 26 will be opened and as the gasoline enters the chamber l it will flow through the opening 27 into the float chamber 21. As the engine is rotated the suction from the intake manifold will. draw up through the casing A and gasoline will be drawn through the coils it) into the chamber E, where it will be mixed. with the required amount of air drawn through the openings in the end of said chamber and the resulting mixture will be drawn in to the cylinders of the engine and will turnish iliuel therefor. When the float chamber r is tilled with the required amount of gasoline o'l gasoline and the air valve will be opened.

No more gasoline will be allowed to enter until the float 4-1 has been lowered enough to rest on the lever 37. The spool 42 will then be released and will fall to the level (it the i'ioat. lhis will draw thelcver 4-5 downwardly and will again open the air suction through the valve 47.

When it is desired. to idle the engine; the cylinder will be rot ated just enough to open the end of the idling supply pipe (35 connected with the chamber 21, and just sufiicient gasoline will be drawn through the pipe to keep the engine running at very slow speed. "To increase the speed of the engine, the cylinder is rotated more and more air is allowed to enter thrr gh the holes 10, 1i and 121 and increased suction draws more gasoline throughthe coils 19, speeding up the engine any desired amount. The farther the cylinder 3 is turned the more suction and, consequently lheinore gasoline drawn through the coil 19, and more air through the end of the cylinder chamber E and the air inlet (l. hen the control cylinder is entirely closed,

oted in said plunger casing; a valve stem,

pivoted on said lever; a valve on said stem adapted to regulate the suction of air in said plunger chamber and vacuum chamber; a depending valve stem carried on said plunger; a rocker lever operable by said valve stem to open. and close a needle valve to regulate the How of gasoline into said vacuum tank; an air inlet in the top of said tank controlled by the movement of said plunger and a valve on. said stem to regulate the How of gasoline from said tank.

2. A vacuum tank having parallel chan1- bers opening to the interior of" said tank;

a float operable in said tank and carried on a rod; a linigitudinally disposed slot in said rod; a bell crank lever pivoted in the slot in said rod; a spool carried on said rod and having a flange portion with a contracted opening adapted to engage the end portion 01 said bell crank lever when said spool is supported by said float, and to be released from said engagement'whcn the spool is not supported by said float; a lever engaging the flange ot said spool; a valve operable by said lever to allow air to be drawn from. said tank; a plunger carried in a casing adjacent said vacuum chamber and in open connection therewith; another casin g adjacent said first-mentioned. casino connected with the 'asoline supply tank and in open connection with said vacuum chamber; a plunger carried in said first-mentioned casing; means to allow air to enter said tank and to shut off said air when ne(a ssary; a valve stem depending from said plunger; a valve on the end of said. stem to shut oil the flow of gasoline from said vacuum tank; another valve stem in the second-mentioned casing; a valve on the upper end of said stem; and a lever having its ends connected with said valve stems and operable by said stems.

In testimony whereof I have afiixed my gnati n'e.

THEODORE BOSSARD. 

